Table 2.

Table attributes and descriptions from database of chlorophyll values in freshwater lakes (ChlData.csv).

Attribute (column header)	Description of attribute	Data with values (%)
ChlaData.csv
uniqueID	Unique identifier for each respective survey instance that exists across all datasets within this database
UniqueLakeName	Unique lake identifier for reference across studies.
StudyID	Study identifier to be connected to the data
Year	Year that lake was surveyed. Can be discrete (e.g. 2005, 2006) or a range of years where the values were averaged (e.g. 2005–2007).
Month	Month that lake was surveyed as a number
Lat	Latitude of survey instance (decimal degrees)
Lon	Longitude of survey instance (decimal degrees)
LakeName	Name of lake as identified within the manuscript or data repository
ChlaValues	Average concentration of chlorophyll a in freshwater lakes at each survey instance (mg L−1)	100
TP	Average concentration of total phosphorus in freshwater lakes at each survey instance (mg L−1)	49.0
TN	Average concentration of total nitrogen in freshwater lakes at each survey instance (mg L−1)	17.3
DOC	Average concentration of dissolved organic carbon in freshwater lakes at each survey instance (mg L−1)	4.6
DO	Average concentration of dissolved oxygen are in freshwater lakes at each survey instance (mg L−1)	< 1
LakeVolume	The volume of the lake that was surveyed in m3	< 1
SurfaceArea	The measured surface area of the lake that was surveyed (km2)	92.9
Depth.mean	The average depth of the lake that was sampled in meters	31.9
Depth.max	The maximum depth of the lake that was sampled in meters	82.5
Secchi	The distance underwater that the Secchi depth was no longer visible from the surface (meters)	85.8
pH	The pH of sampled water	5.7
Chla.flag	An identifier to highlight Chla values that are below the detection limits listed in the study and thus subjected to inaccuracies.	1.5